Budget Amount *help |
¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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Outline of Final Research Achievements |
The noise source of largely deformed rotational objects cannot be identified, because it is difficult to measure vibration and noise near the contact area. The current procedure of predicting the noise consists of three steps; model for input force, FEA modal analysis and acoustic analysis. Since the prediction is performed by an implicit FEA, noise is just predicted at some frequency. The objective of this research is to solve aforementioned problems by solving acoustic/structure interaction by an explicit FEA. The noise level containing every frequency can be predicted and visualized in time domain by the proposed idea. The effect of the angle of lateral groove of a tire and the pipe resonance noise can be predicted and the prediction is in good agreement with the analytical model. The remained subject is to eliminate the unrealistic noise in the prediction caused by salient points of the FEA tire model in the circumferential direction.
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